Color-changing fibers help reveal mysteries of how knots work
A few simple rules can explain why some knots are stronger than others
![knot](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/01/010220_ec_knot_feat.jpg?fit=1028%2C579&ssl=1)
Color-changing fibers reveal areas with high strain (yellow and green) in a knot. Experiments with these fibers helped scientists understand what makes one knot stronger than another.
Joseph Sandt